ABC News’ Mara Schiavocampo and her sister, Pia Schiavo-Campo, have different perspectives on weight loss.

Mara recently lost 90 pounds thanks to healthy eating and daily SoulCycle and Barry’s Bootcamp classes, and just published the book “Thinspired: How I Lost 90 Pounds: My Plan for Lasting Weight Loss and Self-Acceptance.”

But as her sister’s book hit bookshelves, Pia, a plus-size blogger who runs the site Chronicles of a Mixed Fat Chick, wrote a blog post encouraging people to love who they are at any size and not fall victim to diet books and pressure to hit the gym.

“If you haven’t already, you will soon be bombarded with ads for the latest exercise craze, discounted gym memberships, or the diet book that will finally change your life,” Pia wrote.

The two sisters may be on opposite ends of the body-image spectrum, but Pia tells us: “I’m very proud of my sister’s accomplishment…It’s wonderful to see that we can both finally be in a positive place, even though our bodies look very different.”